Genomic coordinate (human 12:46,000,001 HPV18I2).
Cytoband (human 12q13 HPV18I2).
OMIM’ genes @ 12q13 = 105 genes.
Hyperbolic Umbilic Chromosome-12 is 1,200 genes.
Chromosome-12 Cytoband Structure = WG2B2GC_CBG5B2G6
Here I 🎁 present: “Human Papillomavirus-18 Integration Site”, Victor McKusick, Mendelian Inheritance in Man’, 1966. (HPV18I2)
The infographic details the genomic landscape of human Chromosome 12, focusing on the consequences of HPV18 integration at cytoband 12q13.
📍 Genomic Location & Coordinates.
Genomic Coordinate: 12:46,000,001.
Cytoband Location: 12q13 on the long arm (q arm).
Physical Distance: approximately 46.0 Mb from the start of the chromosome.
🧬 Gene Content & Density
Total Genes: Chromosome 12 contains roughly 1,200 genes.
Local Density: 12q13 is a highly gene-rich region, peaking near 30+ genes per Mb.
OMIM’ Genes: 105 clinically relevant OMIM’ genes reside specifically within the 12q13 band.
⚠️ HPV18 Integration Impact.
Viral E2 Disruption: causes a loss of repression on viral oncogenes.
Oncoprotein Expression: drives persistent expression of E6 and E7.
Cellular Checkpoint Failure: leads to p53 degradation and RB1 inactivation.
Genomic Damage: triggers downstream activation of local oncogenes and severe chromosomal instability (CNVs, rearrangements).
📊 Cytoband Banding Pattern.
Structural Formula: Designated as WG2B2GC_CBG5B2G6.
W (White): euchromatin-poor, low gene density regions.
G (Gray): moderate gene density transition zones.
B (Black): gene-rich, high density bands (where this integration occurs).
C (Centromere): centromeric and pericentromeric regions.
